P87C554SBAA NXP Semiconductors, P87C554SBAA Datasheet - Page 28

• Manufacturer Part Number: P87C554SBAA
• Description: MCU 8-Bit 87C 80C51 CISC 16KB EPROM 5V 68-Pin PLCC Tube
• Manufacturer: NXP Semiconductors

Specifications of P87C554SBAA

• Package: 68PLCC
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 16 MHz
• Ram Size: 512 Byte
• Program Memory Size: 16 KB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 40
• Interface Type: I2C/UART
• On-chip Adc: 7-chx10-bit
• Operating Temperature: 0 to 70 °C
• Number Of Timers: 3

Philips Semiconductors
2003 Jan 28
80C51 8-bit microcontroller – 6-clock operation
16K/512 OTP/ROMless, 7 channel 10 bit A/D, I
high I/O, 64L LQFP
Rm = 0.5 - 3 k
C
R
NOTE:
Because the analog to digital converter has a sampled-data comparator, the input looks capacitive to a source. When a conversion
is initiated, switch Sm closes for 8t
should be noted that the sampling causes the analog input to present a varying load to an analog source.
S
S
+ C
= Recommended < 9.6 k for 1 LSB @ 12 MHz
C
= 15 pF maximum
R
V
S
in
– V
+
digital
CODE
OUT
CY
V
ANALOG
INPUT
(4 s @ 12 MHz crystal frequency) during which time capacitance C
Figure 26. Effective Conversion Characteristic
I
N+1
Figure 25. A/D Input: Equivalent Circuit
I
101
100
010
001
000
011
N
QUANTIZATION ERROR
SYMMETRICAL QUANTIZATION ERROR
0
q
+ q/2
– q/2
Sm
Sm
C
2
S
C, PWM, capture/compare,
N+1
N
MULTIPLEXER
2q
28
Rm
Rm
3q
q = LSB = 5 mV
N+1
N
4q
5q
V
V
C
in
in
C
TO COMPARATOR
SU00963
S
+ C
C
is charged. It
80C554/87C554
SU01449
Product data